SUMMARY OF INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Reconciliation of Amortized Cost to Fair Value

The table that follows is a reconciliation of the amortized cost (cost for equity securities) to fair value of investments in held-to-maturity and available-for-sale fixed maturity and available-for-sale equity securities as of December 31, 2016 and 2015.



December 31, 2016
Type of Investment	Cost or Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
HELD-TO-MATURITY
Fixed maturities
Bonds
Corporate bonds - financial services	$	150	$	—	$	—	$	150
Mortgage-backed securities	48		1		—		49
Total Held-to-Maturity Fixed Maturities	$	198	$	1	$	—	$	199
AVAILABLE-FOR-SALE
Fixed maturities
Bonds
U.S. Treasury	$	23,216	$	87	$	108	$	23,195
U.S. government agency	76,692		1,445		540		77,597
States, municipalities and political subdivisions
General obligations:
Midwest	143,747		1,808		1,412		144,143
Northeast	57,731		909		231		58,409
South	129,475		1,249		2,355		128,369
West	114,524		1,380		2,173		113,731
Special revenue:
Midwest	167,430		2,313		1,433		168,310
Northeast	70,202		487		2,624		68,065
South	244,225		1,753		6,791		239,187
West	134,287		1,509		4,052		131,744
Foreign bonds	62,995		2,239		—		65,234
Public utilities	212,360		3,761		447		215,674
Corporate bonds
Energy	107,084		2,195		419		108,860
Industrials	225,526		5,359		982		229,903
Consumer goods and services	178,135		3,847		295		181,687
Health care	81,211		2,063		151		83,123
Technology, media and telecommunications	143,402		2,029		819		144,612
Financial services	269,981		5,328		1,358		273,951
Mortgage-backed securities	17,288		201		241		17,248
Collateralized mortgage obligations
Government national mortgage association	145,947		1,279		2,766		144,460
Federal home loan mortgage corporation	176,226		1,638		3,406		174,458
Federal national mortgage association	101,414		1,816		1,334		101,896
Asset-backed securities	4,407		145		282		4,270
Total Available-For-Sale Fixed Maturities	$	2,887,505	$	44,840	$	34,219	$	2,898,126
Equity securities
Common stocks
Public utilities	$	6,394	$	13,465	$	188	$	19,671
Energy	6,514		8,555		22		15,047
Industrials	13,252		38,715		173		51,794
Consumer goods and services	10,324		13,851		58		24,117
Health care	7,763		19,657		—		27,420
Technology, media and telecommunications	5,931		9,476		38		15,369
Financial services	17,289		98,728		67		115,950
Nonredeemable preferred stocks	1,037		11		—		1,048
Total Available-for-Sale Equity Securities	$	68,504	$	202,458	$	546	$	270,416
Total Available-for-Sale Securities	$	2,956,009	$	247,298	$	34,765	$	3,168,542



December 31, 2015
Type of Investment	Cost or Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
HELD-TO-MATURITY
Fixed maturities
Bonds
Corporate bonds
Technology, media and telecommunications	$	450	$	1	$	—	$	451
Financial services	150		—		—		150
Mortgage-backed securities	72		2		—		74
Total Held-to-Maturity Fixed Maturities	$	672	$	3	$	—	$	675
AVAILABLE-FOR-SALE
Fixed maturities
Bonds
U.S. Treasury	$	21,587	$	100	$	38	$	21,649
U.S. government agency	232,808		2,622		2,400		233,030
States, municipalities and political subdivisions
General obligations:
Midwest	160,484		4,990		18		165,456
Northeast	56,449		1,996		—		58,445
South	125,565		3,358		134		128,789
West	103,721		3,160		67		106,814
Special revenue:
Midwest	152,780		4,956		30		157,706
Northeast	23,892		919		212		24,599
South	144,183		4,281		27		148,437
West	78,935		3,150		44		82,041
Foreign bonds	82,580		2,405		2,457		82,528
Public utilities	213,233		3,701		1,251		215,683
Corporate bonds
Energy	116,800		1,032		4,713		113,119
Industrials	227,589		3,329		6,663		224,255
Consumer goods and services	172,529		2,844		776		174,597
Health care	92,132		2,168		791		93,509
Technology, media and telecommunications	142,431		1,972		2,003		142,400
Financial services	259,382		5,246		1,143		263,485
Mortgage-backed securities	16,413		376		51		16,738
Collateralized mortgage obligations
Government national mortgage association	120,220		1,391		1,985		119,626
Federal home loan mortgage corporation	137,874		2,377		1,342		138,909
Federal national mortgage association	106,021		2,400		941		107,480
Asset-backed securities	5,461		221		16		5,666
Total Available-For-Sale Fixed Maturities	$	2,793,069	$	58,994	$	27,102	$	2,824,961
Equity securities
Common stocks
Public utilities	$	7,231	$	12,022	$	193	$	19,060
Energy	6,103		5,374		266		11,211
Industrials	13,251		31,872		313		44,810
Consumer goods and services	10,301		13,017		3		23,315
Health care	7,763		20,454		—		28,217
Technology, media and telecommunications	5,931		7,538		105		13,364
Financial services	17,392		78,411		109		95,694
Nonredeemable preferred stocks	542		34		—		576
Total Available-for-Sale Equity Securities	$	68,514	$	168,722	$	989	$	236,247
Total Available-for-Sale Securities	$	2,861,583	$	227,716	$	28,091	$	3,061,208

Contractual Maturity of Investments

The amortized cost and fair value of held-to-maturity, available-for-sale and trading fixed maturity securities at December 31, 2016, by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset-backed securities, mortgage-backed securities and collateralized mortgage obligations may be subject to prepayment risk and are therefore not categorized by contractual maturity.



	Held-To-Maturity				Available-For-Sale				Trading
December 31, 2016	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	150	$	150	$	106,058	$	107,080	$	1,753	$	1,774
Due after one year through five years	—		—		840,603		862,053		7,841		8,882
Due after five years through 10 years	—		—		807,723		815,182		1,302		1,406
Due after 10 years	—		—		687,839		671,479		2,158		2,328
Asset-backed securities	—		—		4,407		4,270		—		—
Mortgage-backed securities	48		49		17,288		17,248		—		—
Collateralized mortgage obligations	—		—		423,587		420,814		—		—
	$	198	$	199	$	2,887,505	$	2,898,126	$	13,054	$	14,390

Summary of Net Realized Investment Gains (Losses)

A summary of net realized investment gains (losses) for 2016, 2015 and 2014, is as follows:



	2016			2015			2014
Net realized investment gains (losses)
Fixed maturities:
Available-for-sale	$	2,160		$	3,294		$	3,353
Trading securities
Change in fair value	189			(1,353		)	609
Sales	931			1,381			1,339
Equity securities:
Available-for-sale	2,359			2,521			1,732
Trading securities
Change in fair value	301			(448		)	238
Sales	(6		)	66			(1		)
Other long-term investments	—			(1,315		)	—
Other-than-temporary-impairment charges:
Fixed maturities	—			(1,300		)	—
Cash equivalents	169			—			—
Total net realized investment gains	$	6,103		$	2,846		$	7,270

Schedule of Proceeds and Gross Realized Gains (Losses)

The proceeds and gross realized gains (losses) on the sale of available-for-sale securities for 2016, 2015 and 2014, were as follows:



	2016			2015		2014
Proceeds from sales	$	14,322		$	11,543	$	3,091
Gross realized gains	985			1,134		900
Gross realized losses	(639		)	—		(56		)

Schedule of Net Investment Income

Net investment income for the years ended December 31, 2016, 2015 and 2014, is comprised of the following:



Years Ended December 31,	2016		2015		2014
Investment income
Interest on fixed maturities	$	92,362	$	92,777	$	97,969
Dividends on equity securities	7,050		7,208		6,602
Income on other long-term investments
Investment income	2,394		2,567		1,927
Change in value ⁽¹⁾	10,742		3,266		1,917
Interest on mortgage loans	221		237		252
Interest on short-term investments	84		6		5
Interest on cash and cash equivalents	445		305		255
Other	1,227		1,452		1,998
Total investment income	$	114,525	$	107,818	$	110,925
Less investment expenses	7,703		7,037		6,316
Net investment income	$	106,822	$	100,781	$	104,609


(1)	Represents the change in value of our interests in limited liability partnerships that are recorded on the equity method of accounting.

Summary of Changes in Net Unrealized Investment Appreciation

A summary of changes in net unrealized investment appreciation for 2016, 2015 and 2014, is as follows:



	2016			2015			2014
Change in net unrealized investment appreciation
Available-for-sale fixed maturities	$	(21,271	)	$	(37,621	)	$	51,814
Available-for-sale equity securities	34,179			(6,459		)	15,781
Deferred policy acquisition costs	(4,410		)	11,380			(16,789		)
Income tax effect	(2,975		)	11,446			(17,784		)
Total change in net unrealized investment appreciation, net of tax	$	5,523		$	(21,254	)	$	33,022

Summary of Investments in Unrealized Loss Position

The tables on the following pages summarize our fixed maturity and equity securities that were in an unrealized loss position at December 31, 2016 and 2015. The securities are presented by the length of time they have been continuously in an unrealized loss position. It is possible that we could recognize OTTI charges in future periods on securities held at December 31, 2016 if future events or information cause us to determine that a decline in fair value is other-than-temporary.

We have evaluated the near-term prospects of the issuers of our fixed maturity securities in relation to the severity and duration of the unrealized loss and determined that these losses did not warrant the recognition of an OTTI charge in 2016 or 2014. In 2015, we recognized a $1,300 credit loss OTTI on an energy sector fixed maturity security in our Consolidated Statements of Income and Comprehensive Income. All fixed maturity securities in the investment portfolio continue to pay the expected coupon payments under the contractual terms of the securities. We believe the unrealized depreciation in value of other securities in our fixed maturity portfolio is primarily attributable to changes in market interest rates and not the credit quality of the issuer. We have no intention to sell and it is more likely than not that we will not be required to sell these securities until the fair value recovers to at least equal to our cost basis or the securities mature.

We have evaluated the near-term prospects of the issuers of our equity securities in relation to the severity and duration of the unrealized loss and, unless otherwise noted, these losses do not warrant the recognition of an OTTI charge at December 31, 2016. There were no OTTI losses on equity securities recognized in 2016, 2015 or 2014. Our largest unrealized loss greater than 12 months on an individual equity security at December 31, 2016, 2015 and 2014 was $188, $225 and $54, respectively. We have no intention to sell any of these securities prior to a recovery in value, but will continue to monitor the fair value reported for these securities as part of our overall process to evaluate investments for OTTI recognition.




December 31, 2016	Less than 12 months					12 months or longer					Total
Type of Investment	Number of Issues	Fair Value		Gross Unrealized Depreciation		Number of Issues	Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation
AVAILABLE-FOR-SALE
Fixed maturities
Bonds
U.S. Treasury	9	$	10,800	$	108	—	$	—	$	—	$	10,800	$	108
U.S. government agency	10	36,593		540		—	—		—		36,593		540
States, municipalities and political subdivisions
General obligations
Midwest	27	40,545		1,412		—	—		—		40,545		1,412
Northeast	9	9,874		231		—	—		—		9,874		231
South	37	53,699		2,355		—	—		—		53,699		2,355
West	30	55,265		2,173		—	—		—		55,265		2,173
Special revenue
Midwest	41	62,937		1,433		—	—		—		62,937		1,433
Northeast	22	54,993		2,624		—	—		—		54,993		2,624
South	79	152,979		6,791		—	—		—		152,979		6,791
West	44	81,676		4,052		—	—		—		81,676		4,052
Public utilities	20	38,511		423		2	2,122		24		40,633		447
Corporate bonds
Energy	8	15,938		313		3	8,232		106		24,170		419
Industrials	24	42,854		596		3	5,641		386		48,495		982
Consumer goods and services	11	21,059		295		—	—		—		21,059		295
Health care	9	20,918		151		—	—		—		20,918		151
Technology, media and telecommunications	16	41,230		516		3	10,241		303		51,471		819
Financial services	37	75,286		1,358		—	—		—		75,286		1,358
Mortgage-backed securities	16	9,611		187		5	1,198		54		10,809		241
Collateralized mortgage obligations
Government national mortgage association	36	82,430		2,261		9	13,603		505		96,033		2,766
Federal home loan mortgage corporation	41	105,775		3,165		3	5,141		241		110,916		3,406
Federal national mortgage association	27	46,633		1,091		4	4,341		243		50,974		1,334
Asset-backed securities	1	971		29		1	2,559		253		3,530		282
Total Available-for-Sale Fixed Maturities	554	$	1,060,577	$	32,104	33	$	53,078	$	2,115	$	1,113,655	$	34,219
Equity securities
Common stocks
Public utilities	—	$	—	$	—	3	$	120	$	188	$	120	$	188
Energy	—	—		—		1	163		22		163		22
Industrials	—	—		—		6	239		173		239		173
Consumer goods and services	3	282		55		2	15		3		297		58
Technology, media and telecommunications	7	26		5		8	33		33		59		38
Financial services	3	53		3		2	150		64		203		67
Total Available-for-Sale Equity Securities	13	$	361	$	63	22	$	720	$	483	$	1,081	$	546
Total Available-for-Sale Securities	567	$	1,060,938	$	32,167	55	$	53,798	$	2,598	$	1,114,736	$	34,765




December 31, 2015	Less than 12 months					12 months or longer					Total
Type of Investment	Number of Issues	Fair Value		Gross Unrealized Depreciation		Number of Issues	Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation
AVAILABLE-FOR-SALE
Fixed maturities
Bonds
U.S. Treasury	6	$	6,408	$	26	2	$	1,634	$	12	$	8,042	$	38
U.S. government agency	38	104,621		1,771		6	18,821		629		123,442		2,400
States, municipalities and political subdivisions
General obligations
Midwest	4	2,417		12		1	528		6		2,945		18
South	3	4,805		55		8	3,743		79		8,548		134
West	4	8,927		23		2	2,274		44		11,201		67
Special revenue
Midwest	—	—		—		1	2,494		30		2,494		30
Northeast	1	4,755		212		—	—		—		4,755		212
South	4	7,445		26		2	1,851		1		9,296		27
West	4	6,851		44		—	—		—		6,851		44
Foreign bonds	9	16,991		1,289		2	4,036		1,168		21,027		2,457
Public utilities	35	72,680		880		5	2,840		371		75,520		1,251
Corporate bonds
Energy	29	61,496		3,286		4	7,991		1,427		69,487		4,713
Industrials	38	78,588		3,631		3	6,649		3,032		85,237		6,663
Consumer goods and services	24	64,661		770		4	2,491		6		67,152		776
Health care	18	43,992		652		2	3,737		139		47,729		791
Technology, media and telecommunications	22	59,503		1,478		2	8,940		525		68,443		2,003
Financial services	49	92,814		1,143		—	—		—		92,814		1,143
Mortgage-backed securities	9	7,423		43		4	183		8		7,606		51
Collateralized mortgage obligations
Government national mortgage association	17	29,769		437		14	40,027		1,548		69,796		1,985
Federal home loan mortgage corporation	20	35,343		644		6	19,887		698		55,230		1,342
Federal national mortgage association	15	32,800		524		11	11,962		417		44,762		941
Asset-backed securities	1	985		16		—	—		—		985		16
Total Available-for-Sale Fixed Maturities	350	$	743,274	$	16,962	79	$	140,088	$	10,140	$	883,362	$	27,102
Equity securities
Common stocks
Public utilities	—	$	—	$	—	3	$	115	$	193	$	115	$	193
Energy	10	2,868		266		—	—		—		2,868		266
Industrials	3	177		44		5	193		269		370		313
Consumer goods and services	—	—		—		2	14		3		14		3
Technology, media and telecommunications	9	438		91		2	12		14		450		105
Financial services	6	326		51		1	136		58		462		109
Total Available-for-Sale Equity Securities	28	$	3,809	$	452	13	$	470	$	537	$	4,279	$	989
Total Available-for-Sale Securities	378	$	747,083	$	17,414	92	$	140,558	$	10,677	$	887,641	$	28,091